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The 25-Watt SolarPulse SP-5 charger combines ReNew-IT Pulse Technology ® with an exceptional charging system. ReNew-It Technology safely prevents the main cause of battery problems and failure: sulfation buildup on lead-acid battery plates. Used extensively by the consumers and the U.S. Military worldwide for over ten years, this technology has been scientifically proven by two major universities to make batteries work harder and last longer than you ever thought possible. Pulse Tech makes three other SolarPulse models: 2 Watt (735X302), a 5-Watt (735X305), and a 6 Watt (735X613).

Sulfation is the buildup of lead sulfate (PbSo4) crystals on your battery plates.

All lead acid batteries will suffer from the effects of sulfation. It is the unwanted byproduct of the natural double sulfate chemical reaction that generates electricity within the battery. When a battery is in use, the active material on your battery’s plates, lead and lead dioxide, react with the electrolyte or sulfuric acid (H2SO4) to generate electricity. During this process a thin layer of non-crystalline solid lead sulfate is deposited on the plates.

During charging, this sulfate deposit is supposed to be converted back to lead dioxide and sulfuric acid restoring the battery back to its pre-discharged state. However, the process is not perfect. Incomplete charging or prolonged time left in a discharged state will convert the amorphous (non-crystalline) lead sulfate into a hardened crystalized form diminishing the ability of the battery to reach full charge.